Three kinds of main plugging factors in A8 well have been analyzed, their sequence is effluent oil plugging, solidity invasion plugging and sanding plugging.
分析了造成A 8井堵塞的三种主要原因，认为堵塞的原因依次是污油堵塞、固体颗粒侵入堵塞和地层出砂堵塞。
The article provided three examples using holes plugging technology under pressure.
并给出了采用带压堵漏技术的三则应用实例。
The three block self plugging structure of rubber impeller die is introduced.
介绍了橡胶叶轮模具三块式抽芯结构。
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